204 RHYNCHOPHORA. 
subacuminate elytra. These are finely and confusedly punctured, slightly shining 
from the base to the middle, and very delicately granular on the declivity. 
11. Xyleborus monachus, sp. n. (Tab. VII. fig. 17.) 
Mas. Oblongus, subnitidus, densius pilosus, castaneus, prothoracis disco infuscato; illo oblongo anterius vix 
angustato, supra caput in lobum longum prorsus producto, ejus margine antico truncato, medio tuberculato, 
dorso antice late impresso; elytris prothorace vix longioribus, subtiliter irregulariter punctatis et pilis 
appressis vestitis. 
Long. 2°7-2-9 millim. 
Male. Oblong, moderately shining, castaneous- brown, the middle and apical margin of the pronotum infuscate. 
Head concealed under the prothorax, flat in front, the eyes rather small and coarsely granulate, the 
antenne infuscate. Prothorax oblong, subrectangular, subbisinuate at base, the hind angles obliquely 
rounded, the sides straight, nearly parallel behind, slightly narrowed at the anterior third, which is 
produced over the head as a free obliquely-declivous peak, the fore angles rounded, the apex truncate, 
produced in the middle into a small triangular tooth ; obliquely declivous above from near the base to the 
apex, the anterior third more strongly curved downwards, widely impressed, the impression occupying 
the apical lobe, the borders of which are acutely elevated, and extending backwards in the middle line to 
behind the anterior third part, its posterior margins oblique and convex, its fundus flat, shining and 
punctured in front, with a shallow subimpressed median space, rugulose behind; surface behind the 
margins of the impression flattened as far as the basal third, covered, together with the margins, with 
subasperate piliferous punctures, basal third rather closely punctured ; median line impunctate, traceable 
from base almost to apex. Scutellum small, rounded. Elytra equal in length to the prothorax, almost 
parallel-sided to the middle and then regularly rounded to the apex; surface convex from the base, 
strongly declivous behind the middle, finely and irregularly punctured, with rather close decumbent 
pubescence. Underside and legs brownish-testaceous ; the tibie slender and feebly spined. 
Hab. GuateMALa, Cerro Zunil (Champion). 
Two examples have been obtained, with which no female form can be associated. 
Judging from the structure of the elytra, I take this species to be a neighbour of 
X. capucinus, Fichh., but it is too large to be the male of that species. ‘The form of 
the prothorax is intermediate between that of X. cucullatus, Blandf., from Japan, in 
which the head is covered by a broad anterior lobe without any dorsal impression, and 
of such species as X. eurygraphus (Ratz.), ¢, which presents a deep fossa on the front 
of the pronotum and a tubercle on the apical margin, but has no marked flap-like 
prolongation over the head. When examined in a good light the elytra of this species 
show lines of punctures in their substance which are not clearly separable by reflected 
light from those of the interstices, the elytra then appearing irregularly punctate. It 
is probable that all the elytra of Xylebori, which appear to be confusedly punctured, 
would show such lines of punctures in their structure if they were sufficiently 
translucent. 
12. Xyleborus villosulus, sp. n. 
Fem. Oblongo-ovata, subnitida, flavo-testacea, pube erecta densius villosa; prothorace semi-elliptico, apice 
medio tuberculis prominulis notato, supra convexo, vix gibboso, postice confertim punctato; elytris sub- 
ovalibus, subtiliter lineato-punctatis, interstitiis multipunctatis, apice densius piloso, subtilissime granulato, 
preter suturam substriato. 
Long. 2°3 millim. 
